Lawyers representing Sacha Baron Cohen and David Letterman have moved to dismiss a $110 million (£73 million) lawsuit against them by arguing the case cannot be processed in the U.S. because two of the parties are not American.Palestinian grocer Ayman Abu Aita filed suit against the British funnyman over his controversial movie Bruno after a caption in the film described him as "Terrorist group leader, Al Aqsa Martyrs Brigade." Abu Aita alleged he was defamed when he was named as a mock-terrorist in the movie - as many viewers didn't get the joke. He included U.S. TV host Letterman in the suit after he aired the clip on his talk show. But in new legal documents, filed in Washington, D.C., lawyers representing the defendants claim the suit should be dismissed because neither Cohen nor his accuser are American, and partly because "Palestine is not recognised as a foreign nation by the United States." A judge has yet to rule on the motion, according to TMZ.com.